Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hexavalent-chromium wastewater treatment technology

A wastewater treatment and hexavalent chromium technology, which is applied in the field of hexavalent chromium wastewater treatment process, can solve the problems of troublesome operation and high treatment cost, and achieve the effects of low equipment investment and operation cost, simple operation and improved economic benefits

Inactive Publication Date: 2016-08-17
CANGZHOU HONGHAI CHEM CO LTD
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a hexavalent chromium wastewater treatment process to

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hexavalent-chromium wastewater treatment technology

Examples

Experimental program
Comparison scheme
Effect test
No Example Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a hexavalent-chromium wastewater treatment technology. The hexavalent-chromium wastewater treatment technology includes the steps that hexavalent chromium in wastewater is reduced to trivalent chromic ions through sodium hydrogen sulfite with the oxidation-reduction method, the PH value is adjusted, and trivalent chromium forms chromic hydroxide to be removed in a precipitation method accordingly. Compared with other treatment methods, the method is low in device investment and operating cost, easy to operate and suitable for hexavalent-chromium wastewater treatment of the electroplating industry, the printing and dyeing industry, the pharmaceutical industry, the light and textile industry, the chemical industry and the like, wastewater is sustainably treated on the spot, and pollution of the industry to the environment is reduced; meanwhile, the economic benefits of enterprises are increased, and the win-win effect is achieved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a hexavalent chromium wastewater treatment process. Background technique [0002] At present, the chromium-containing wastewater mainly comes from the metal electroplating industry, and metal processing enterprises such as the steel manufacturing industry and the domestic metallurgical and chemical industries discharge about 200,000 to 300,000 tons of chromium slag every year. The harmful components in chromium slag are mainly hexavalent chromium ions such as soluble sodium chromate and acid-soluble calcium chromate. Because of these hexavalent chromium and its loss and diffusion, it constitutes a pollution hazard to the ecological environment. The second is the strong alkali hazard of chromium slag. When chromium slag is piled up in the open air, a large amount of hexavalent chromium ions dissolve, lose, and infiltrate into the surface with rainwater after long-te...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F9/04C02F101/22
CPCC02F9/00C02F1/00C02F1/56C02F1/66C02F1/70C02F2101/22C02F2301/08
Inventor 马海青李晨周敬伟
Owner CANGZHOU HONGHAI CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com